Formation and General Features of Ruwenzori. 
The watershed line starting from the peak to the extreme 
south, the Weismann, runs eastward along Mt. Luigi di Savoia, 
then northwards over Fresh field's Col and along Edward Peak 
and Semper Peak of Mt. Baker. From this point, making 
a wide half-circle, it runs along the high ridge of the Bujuku 
Valley over Scott Elliot’s Col, over the peaks of Mt. Stanley 
and Stuhlmann’s Col as far as Vittorio Emanuele Peak, then 
descends along the north-east ridge of Mt. Speke to Cavalli’s 
Col, traverses the summit of the two parallel groups, Emin and 
Gessi, crossing Roccati’s Col between them. From Iolanda 
Peak of Mt. Gessi it follows a south-easterly ridge to the 
group of the Portal Peaks, whence it turns north-east again. 
The most important river basin to the east of the chain 
is that of the Bujuku Valley, which is surrounded by five 
mountain groups and is fed by the greater glaciers of Mt. 
Stanley, Mt. Speke, and Mt. Gessi. The Upper Mobuku 
Valley, on the other hand, receives only the waters of the 
Baker glaciers and of a few little glaciers on the eastern side 
of Mt. Luigi di Savoia through the Malioma torrent. Hence 
the Mobuku River is much smaller than the Bujuku River, 
and is in reality a mere affluent of it. It would, therefore, be 
more geographically correct to name the entire valley Bujuku, 
even if only because the two greater mountains stand at its 
head as w r ell as Stuhlmann’s Col, which is the deepest 
depression of the whole range and lower than Freshfield’s 
Col. The- name Mobuku, however, as applied to both river 
and valley, has been so widely spread by preceding explorers 
that H.R.H. did not think fit to change it, in order to 
avoid confusion in the nomenclature. 
The atmosphere around Ruwenzori is so misty and so 
lacking in transparency, even in fine weather, that the Duke 
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